Rotary pump with wiper insert
US6053717A · kind A · utility
35Cited by
4References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1997 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Nov 25, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2225/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A positive displacement rotary pump with an improved impeller design integrating a replaceable wiper insert. The impeller generally has or more lobes and an equal number of conjugate surfaces. Each lobe has a cavity which holds a wiper blade. The wiper blade improves efficiency by making a seal with a pump chamber or the conjugate surface on the other impeller as it rotates. The wiper is pressed radially outward from a central axis of the impeller by a biasing means such as a spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.